Reamer.



LLORENZ. BEAMER,

APPLIUATION FILED MAR. 15,1911.

/L by". .j/0 7 Z l Z5 3 E.. Y, ,A Z 46c 6 8 "Xgl: 8 I 9 4J 3Q 1 l 57 @A64 f7 l 36 l l/ 350 a 26M l /f 56 3? 59\ y Patented Apr. 15, 1913.

2 SHEETS-SHEET 1.

J. LORENZ.

REAMER.

APPLICATION FILED MAR.15, 1911.

Patena Apr. 15,1913.

INl/ENTOR WTNESSES `UMTED STATES PATENT OFFICE.

To cllfwlwni, it may concern:

JOSEPH LORENZ, OF

ROBINSON, rumors.

` BEAMER.

Be it` known that I, JOSEPH. IbmaNz, a

citizen ofvthe United States, and a resident- 0f`R0binson in the county of. Crawford,

State of Illinois, have' invented a new and-.

.useful Improvement in Reamers, of which the following 'is a specification.

My= invention is an improvement in reamers, and consists in certain novel constructions'- and.- combina-tions of parts hereinafter describedand claimed.'

'The object of the invention is -to provide a tool of the character specified, especially adapted for under teaming, wherein theparts may be contracted'to y rmitthe passage ofthe' tool through t e well' caslng, which willautomatically expand into .wor

ment of improvement with thel lng' condition 'when the proper position is reached, and wherein a safety device is provided f llpreventing the accidental displaceef parts.

4Referring vto the, drawings forming a art hereof: Figure 1 is a vertical section o the 'arts in position to permit the device'tobe. Eiwered. through the well casing; Fig.'2f1s a similar view of the improvementatright-.ang-lesto Fig. 1; Fig.

348e view similar. to Fi 2show1'ng the partsthe wellin. working position; Fig.

4 is asix'nilarlview at right an les to Fig.'3;

' Fig. 5 is a'perspeotive view o the complete toolwith the parts-in the position of Fig. 1;

Fig. 6 isa similar view of the plug and a.

part of the stem; Fig. 7 is a perspective view of. the stem; Fig. 8 is-aperspect'ive view of oneof-he reamer-bitsgFig. 9 is a perspective viewof one ofthe safety dogs; and

Figs. 10 and 11. are sections on the lines` 10--10 and 11-11, respectively, of Fig. 2.

,The present embodiment of the invention comprises a Vtubular casing 1, in which is mounted at the top' a plug 2, providedwith casing and plug 'and threaded into a threaded stem '3 at lts top. for 'attachment to a drillstem and the plug is held in place by a'pin 4, passing transversely-through. the the casing at one end as indicated.

A stem 11, Fig. -7, is held in .the ca.-'ing,

the said stem having a lug 5 at its top,wlnch is provided with a transverse rectangular opening 6 for engagement by the teeth 7 of dogs or latches 8 pivoted at 9 in openings 1n the plug and-pressed together into engagea coil. spring 10.

ment with the opening from slightly beb The stem' 11 is dividedy low its center to its' lowerv end by a. long Specification of Letters Patent. application :nea Ima 15, 1911. semi mi. 614,534.

. engaging above shou wedges orcams 14 and the 'arms 13.1.` Tlf/will PatentedF Apr. 15, 1 9`13.

the grooves the outer .face-i of the. bit is roun ed at 20 to lit-within the casingl.

The bits 'are held in ing transversely throgh'the groovesv 19, and ders 22 between the beevident that when the--wedges arepulled upward, that is, when the dogs 8 are en aged with the opening 6, the bits are presse `ontcasing- 23 and into cutting osition.

between the round portion and an enlarged the stem'below the s oulder and between the above the shoulders 2 2. acts to raise the wedges into the position shown in 'F ig. 3.

The portion 25 of the stem is of a diamlongitudinally extending spreading fingers 28 oncach side. Above the portion 25 the stem isrectangular in cross section, as shown-at 29, to about the longitudinal center of the 'lug 5, and the said lug is extended laterally on both sidesof the said rectangular portion, as shown at 30, so that the stem is 'cross' shaped in cross section.

away at each side'at 25? to receive the porv tions 25 of thev stem. On the inn'er face guideways 28a are provided extending longitudinally of the plug for receiving the fingers 28.

33 in the. wail of the casing 1, the said slots g. being directly-opposite each other and being place by pin s 21 pass- I' A shoulder 24- is' provi ed'on the stem 1 portion 25, and a s iral spring26 encircles practically of the plug between the cntaway portionsA A pair of dogs 32 are arranged in slots tudinal slot 12 into two substantially parallel resllgent arms 13, each of which is provided arranged. Each reamer,

transverse groove 19 on each side'and above f .wardlyebeyond theouter face of the well same and acap 27 which-encircles the stem The spring normally eter to fit the casing -1, but thesaid portion iscut away at opposite sides to form a pair of The plug 2 (Fig. 6).is hollow and iscutv lo' The portions 35 of the dogs extend through the' slots 33 and are adapted to'be engaged by a ring 37 which encrcles the vcasing 1. The said ringr when pressed downwardly on the casing engages the inclined 4v15 edges of the portions 35" and forces the lower ends of the dogs inwardly, so that the ortion 35a of the rib 35 below the notch 36 1s ush withtheouterV face of the casing. The dogs are moved outwardly to project the portions 35? of `the ribs beyond the surface of the casing 1 by levers l38, each of' which is pivoted'at one end at 39 in a re'- cess 39 formed in one side of the adjacent gudeway 28. The 'free ends of the levers `exteridupwardly between the lower ends of ,the-dogs 32 and willbe evident that -when the levers are lspread by the fingers 28, the lower ends 'of the dogswill also be moved outwardly, Y s The lower end of the casing 1 is slotted at each side at 41 to 'rmit the reamer bits to Swingin tlush witli theface'of the casing,

. g and the slot 4L is continued to the lowerend of thefcasin to permit the Awedges to move .35 ,'freely. Eac of thewedges is provided with an opening k42 for the insertion of a tool to move the wedgesy manually, andwhen. in their uppermost position the wedges extend far enough below the casing to expose the '40 openings. The casing is also provided with a transverseilongitudinally extending web 43 between the wedges, and when the wedges are' in their lowest position the junction of the arms 13 is near the top of the web. The

45 upper or outer ends 45 of the dogs 8 extend through openings'or slots 46ufin the wall of. the casing 1, as shown in Figs. 2 and 3. b

The upper end of the lug 5 is beveled to `inform oppositely arranged inclines 46, and

oppositely arranged shoulders 46a. The inclines 46 are adapted to enter between and spread the dogs 8 to permit the teeth 7 ot the said dogs 8 to engage the opening 6 ot the lug 5, and the shoulders 46 are adapted for engagement by the ribs 34* of the dogs 32,'as shown in Fig. 1, to hold the stem and the wedges in lowered position. The ribs 34are beveled downwardly, and the shoulders 46 are shaped to fit the said bevel ot the ribs, so that the said ribs will retain and hold the stern in lowered position, as long as they are in the position shown in Fig. 1. The ring 37 will retain the dogs in this position, until the lower ends of the said dogs have entered the well easing. After .the dogs have entered the well casing, the said casing will retain the dogs in such position until the said dogs pass ont at the lower end of the well easing". when the springs 26 will force 70 the stem ulinvardlv, and the shoulders 46' of the stein will spread the dogs to permit the passage of the lug The dogs 32 are spread b v the levers acted upon by the spreading fingers 28. The upper end of each portion 28 of the stem is beveled, as shown at 47, for .engagingr the levers t0 spread the said levers and the dogs, as indicated in Fig. 4.

To introduce the tool,.1`.l1e parts are ar 80 ranged in the position shown in Fig. 1. that is with the wedges in their lowermost position, so that the outer surface of the bits 15 is iush with the outer surface of the casing 1, the spring 26 being compressed, 85 and the dogs S disengaged from the lug 5. The dogs 32 are in their innermost position. and "re held in this position by the ring 37. Whne the dogs 32 are in this position, the

lugs 34"L at their lower ends engage above the 90 shoulders 46v at the upper' end of the stem. The tool is now introduced into the well casing, and lowered until the ring 37 rests upon the top of the said well casing. The further movement of the tool causes the tool to slip through the ring 37, the said ring being held at the top of the casing. The dogs 32, however, Cannotmove outward, because of theA engagement of the portions 35 with the inner face of the well Casing, and the' only purpose of the ring 37 is to hold the dogs 32 in inward position, until the tool has passed far enough into the well casing 1 to permit the portions 35av to engage the inner face of the' well casing. 105

It. will be noticed frbm an inspection of Fig. 1, that the portions 35a of the dogs 32 extend below the ring 37, so that when the ring is resting upon the top of the well casing, the lower ends ot the dogswill have en- 11o tered the casing. While the members are in the above mentioned position, the spring 26 is under compression, and is held compressed by the dogs 32.

.I he shoulders 46a of the stem bear against 115 the ribs,34a, and since the dogs 32 cannot move outward, the stem cannot move upward, and the spring 26 is held compressed.

`YVhen the tool passes below the bottom of the well easing, as shown in Fig. 3, the. dogs 32 are no longer held in their inward position, and the spring 26 expands, driving the stem upward, and moving the wedges 14 upward, to cause them to extend the bits -15 beyond the outer surface of the casing 1. The upward movement of the stem causes the. shoulders 46a to press the lower ends of the dogs 32 outwardly, as shown in Fig; 4, so that the portions 35l of the rib 35 are extended beyond the casing 1, as indicated in 13o notaire Fig. et. The spreading fingers 38 are exp'anded by means of the shoulders 47, and are retained in their outward or expanded position by the portion 29 of the stem. The molines 46 of the stem pass upward between the portions 7 of the dogs 48, and

spread the said portions 7 until the opening 6 of the stem is 1n register with the portions 7 of the dogs 8. As soon as this occurs, the 10 spring 10 draws the lower ends of the dogs together, to cause them to engage the open ing 6 to hold the stem in the position shown in Fig. 3. The tool is now ready for operation, the bits being held in extended position to underream the well casing, as shown in Fig. 3. The bits cannot move inward as long as the wedges are in the-position of Fig. 3,y and shouldthe'dogs 32 engageobstructions in the well hole below the casing, the wedges might be moved downward,.to `per mit the bits'to be pressed inwardly.l The dogs 8, however, act as safety devices, to preventany closingo the bits, that is to prevent any' downward movement oi? the Wed es.

W en the tool is to be withdrawn fromv the well, it is drawn upward, until the portions 45 of the dogs 8 engage the bottom orlower end of the well casing.` As soon as this ocvthe opening 6 of theA stem, and the dogs 8 are held in this position until -they pass above the top of the well casing. A Ifurther upward movement of the tool causes the upper ends of the portions a of the ribs 35 to engage theV lower end ofthe well casing,

and as the tool is moved farther upward, the said dogs 32 are moved downward with ref spect to the tool. The ribs 34a of the dogsv 32 are in engagement with the shoulders 48 of the stem, and 'as the dogs 32 are moved downwardly with respect to the tool, the stem is also forced downward, compressing the spring 26 and moving the wedges from between the bits and the wedge 43.

It will `be noticed from an ins ection of Fig. 4, that the lower ends of the ogs 32 are prevented from moving inward by the levers 38, and the levers are held in outward posi- Vtion b the spreading lingers 28. The said leverslold the dogs in outward position, until lt e upper ends of the portions 35a of the ribs 35 are in engagement with the lower 55 end of the well casing, and after the'saidA upper ends of the said portions are engaged with the end of the well casing, the friction exerted will hold the dogs from inward movement. ,After t-he dogs 32 have been move ldownwardly to the lower ends of the slots,33, the traction 'is relaxed slightly, after-which the tool is again moved upward. The'dogs 32 are now'pressed inwardly, since they .cannot move further downward with respect to the tool, and there is nothing to curs, the upper ends of the dogs 8 are mougd inward-ly, causing t-he portions 7 to releasel` A shoulders Vcasing having a slot adjacent to each dog'` revent their inward movement, since they ave passed below the levers 38. The wedges are far enough below the bits to' permit the bits to swing inward, and to permit the entire tool to be withdrawn through the 7gg, weil casing. I

lt will be noticed that only the rib 35 of the dog 32 engages the slot- 33, the rrr-ain por-1 tion of the dog being inside of the casing. Shouldor any reason the seid dog 32 be'- eome disengaged, the dogs 8 will heid the stem in upward position, that is, witliyther'I wedges between the bits and the web 43.'

l claim:

l. A reamer comprising a tubular casing, g5@ oppositely arranged reamer bits at 'the lower end of the casing, said casing hav-- ing a transverse web between the bits,

a wedge between each bit and Vthe web' for forcing the bit outwardly into cutting g5#- position, a stem in the casing, a resilient arm connectingv each wedge with the stem, a spring acting normally to force the stem up# wardly to extend the bits, said casing having oppositely arranged longitudinal slots gq intermediate its ends, a dog in the casing adjacent to each slot, each doe having a stop extending through the slot' or engagement by the inner surface4 of the well casing to hold the dog in innermost position, or for an.

engagement by the lower edge of the welll ycasing to move the dog longitudinally of the tubular casing, each of the said dogs having a beveled transverse rib on its inner face, the stem having beveled shoulders at its uppererlue end -or engagement by the ribs when the dogs are in innermost position, and having shoulders below the first -named and offset outwardly therefrom for engagement by the lower ends ot l the dogs when thesaid dogs are in outermost posit-ion, a lever pivoted in the casing adjacentto each dog, and on the inner side thereof, spreading lingers on the stem for engaging the levers to move the dogs outwardly, and pivotally mounted auxiliary dogs for holding the stem' in uppermost po# sit-ion, each of the said auxiliary dogs having a trip en'd extending through the casing for engagement by the well casing to trip the dogs to release the stema' v 2. A reamr comprising a tubular casing," oppositely arranged reamer bits at the lower,A end of the casing, the outer faces of the bits being normally flush with the outer face of 12o the casing, a wedge for forcing each bit outwardly beyond the outer surface of the casing, a stem slidable in the casing and to which the wedges are connected, a spring normally forcing the stem upward, a pair oi 125, oppositely arranged dogs in the casing, the

and the dog havinga stop extending throng the slot for engagement by the inner suri'ace of the well casing to hold the dog 'in- 130 vwardly or for engagement by the end of the gagement by the dog when in innermost position to hold the stein in downward position, and having other shoulders oliiset out' Wardly from the first-named shoulders for engagement by the lower ends of the dogs when in outermost position to move the stem downwardly to release the bits from the wedges, spreading fingers on the stem for moving the dogs into outermost position, and a pair oiE auxiliary dogs for engaging the stem to hold it in uppermost position, each of the said dogs having a tripping end extending outside ot the easing for engagement with the well easing to release the dogs.

3. A real-ner comprising a tubular casing, oppositely arranged reamer bits at the lower end of the casing, the outer faces of the bits being normally flush with the outer face of the easing, a wedge for forcing the bits outwardly beyond the outer surface of the casing into cutting position, a stem connected with the wedge and slidable in the casing, a spring normally pressing the stem upward, a plurality of dogs in the casing,

said casing having a longitudinal slot adjacent to each dog, and each dog having a :stop extending through the slot for engagement by the inner surface of the well casing to hold the dog in innermost position or for A'engagement by the lower end of the well casing to move the dog longitudinally, said stem having a pllirality of pairs of shoulders, one pair for engagement by the dogs when in innermost position to hold the stem in lowermost position, and the other pair for engagement by the dogs when in uppermost position to move the stein downward with the dogs, auxiliary dogs for holding the stem in uppermost position, and means in connection with the said auxiliary dogs for engagement by the well casing to release the said .'dogs, sai auxiliary dogs being arranged at the top of the tubular casing, the stem having a transverse opening near its top for engagement by the dogs,and having its upper end beveled for engaging the dogs to spread the same,and spreading tingers on the stem for moving the first-named dogs to outermost position.

4. A reamer comprising a tubular casing,

.oppositely arranged reamer bits at the lower end of the casing, the -outer faces, of

the bits being normally iiush with the outer face of the casing, a wedge for forcing the bits outwardly beyond the outer surface of the casing into cutting position, a stem connected with the wedge and slidable in the casing, a spring normally pressing the stem upward, a plurality of dogs in the casing, said casing having a longitudinal slot adjacent to each dog, and each dog having a stop extending through the slot for engagement by the inner surface of the well casing to hold the dog in innermost position or for engagement by th`e lower end of the Well casing to move the dog longitudinally, said stem having .a plurality of pairs of shoul- 1in connection with the said auxiliary dogs for engagement by the well casing to release the said dogs, the stem having means -for moving the ymost position.

rst-named dogs to outer- 5. A reamer comprising a tubular easing,

a pair of oppositely arranged cutting bits at the lower end thereof, and normally ush with the outer surface of the casing, a' longitudinally movable stem in the casing, means on the stem for extending the bits beyond the casing when the stem is moved upward with respect to the casing, a spring normally acting to force the stem upward to extend the bits, a dog slidable in the casing, said casing having a slot and the dog a rib extending through the slot for engaging the lower end of the well casing to move the dog downward when the tubular casing is moved upward, said dog having' means for engaging the stern to move the stem downward with the dog, and a'safety device comprising -other dogs engaging the stem when in upward position, the casing being slotted adjacent to the last-named dogs, and each ofthe said dogs having a portion eX- tending through the slot for engaging the well casing to operate the dogs to release the stem.

JOSEPH LORENZ Witnesses:

THOMAS S. APGAR, ORLIN H. KIRK. 

